################################################################################
##
## Filename:	Makefile
## {{{
## Project:	Zip CPU -- a small, lightweight, RISC CPU soft core
##
## Purpose:	This makefile builds an assembler preprocessor (zpp), an
##		assembler (zasm) and a disassembler (zdump).  Make with no
##	arguments will produce these files.  Other targets include:
##
##	make clean
##	make test
##		Assembles a test file and then produces a disassembly of it.
##	make depends
##		Doesn't work.  Dependencies are currently all hand coded.
##	make tags
##	make install
##		Attempts to copy zasm, zpp and zdump to the install directory, 
##		defined herein
##
##
## Creator:	Dan Gisselquist, Ph.D.
##		Gisselquist Technology, LLC
##
################################################################################
## }}}
## Copyright (C) 2015-2023, Gisselquist Technology, LLC
## {{{
## This program is free software (firmware): you can redistribute it and/or
## modify it under the terms of the GNU General Public License as published
## by the Free Software Foundation, either version 3 of the License, or (at
## your option) any later version.
##
## This program is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
## for more details.
## }}}
## License:	GPL, v3, as defined and found on www.gnu.org,
## {{{
##		http://www.gnu.org/licenses/gpl.html
##
################################################################################
##
## }}}
## Make definitions
## {{{
OBJDIR=	obj-pc
CXX=	g++
CC=	gcc
YACC=	bison
LEX=	flex
YYMMDD=`date +%Y%m%d`
DBGFLAGS= -g -O0
OPTFLAGS= -O3
CCFLAGS= $(DBGFLAGS)
PROGRAMS= zasm zdump zpp
INSTALLD= ../install/cross-tools/bin
CFILES= asmdata.cpp twoc.cpp zdump.cpp zopcodes.cpp zparser.cpp
HFILES= asmdata.h twoc.h zopcodes.h zparser.h

.PHONY: programs
## }}}
all:	$(OBJDIR)/ programs
programs:	$(PROGRAMS)

install: zasm zdump zpp
	bash -c "if [[ ! -e $(INSTALLD) ]]; then mkdir -p $(INSTALLD); fi"
	cp $^ $(INSTALLD)/

$(OBJDIR)/zpp.cpp: zpp.l
	$(LEX) -o $@ $^
$(OBJDIR)/zpp.o: $(OBJDIR)/zpp.cpp
	$(CXX) -c $(CCFLAGS) $(OBJDIR)/zpp.cpp -o $@
zpp: $(OBJDIR)/zpp.o
	$(CXX) -o $@ $(CCFLAGS) $^

$(OBJDIR)/zasm.tab.h: $(OBJDIR)/ zasm.y asmdata.h zparser.h
	$(YACC) -b $(OBJDIR)/zasm -d zasm.y
$(OBJDIR)/zasm.tab.c: $(OBJDIR)/zasm.tab.h
$(OBJDIR)/zasm.tab.c: ;
zasm.output: zasm.y asmdata.h
	$(YACC) -v -b $(OBJDIR)/zasm -d zasm.y
$(OBJDIR)/zasm.lex.cpp: zasm.l $(OBJDIR)/zasm.tab.h
	$(LEX) -o $@ zasm.l
$(OBJDIR)/zasm.lex.o: $(OBJDIR)/zasm.lex.cpp
	$(CXX) -c -I. -I$(OBJDIR)/ $(CCFLAGS) $(OBJDIR)/zasm.lex.cpp -o $@
$(OBJDIR)/zasm.tab.o: $(OBJDIR)/zasm.tab.c $(OBJDIR)/zasm.tab.h
	$(CXX) -c -I. -I$(OBJDIR)/ $(CCFLAGS) $(OBJDIR)/zasm.tab.c -o $@
$(OBJDIR)/asmdata.o: asmdata.cpp zopcodes.h zparser.h
	$(CXX) -c -I. $(CCFLAGS) asmdata.cpp -o $@
zasm: $(OBJDIR)/zasm.lex.o $(OBJDIR)/zasm.tab.o $(OBJDIR)/asmdata.o
zasm: $(OBJDIR)/zparser.o $(OBJDIR)/zopcodes.o $(OBJDIR)/twoc.o
	$(CXX) -o $@ $(CCFLAGS) $^

ZDMPSRC= zdump.cpp zopcodes.cpp twoc.cpp
ZDMPOBJ= $(addprefix $(OBJDIR)/,$(subst .cpp,.o,$(ZDMPSRC)))
zdump:	$(ZDMPOBJ)
	$(CXX) $(CCFLAGS) $(ZDMPOBJ) -o $@

$(OBJDIR)/%.o: %.cpp
	$(CXX) -c $(CCFLAGS) $< -o $@

$(OBJDIR)/:
	@bash -c "if [ ! -e $(OBJDIR) ]; then mkdir -p $(OBJDIR); fi"

.PHONY: test
## {{{
test:	dumpd.txt
z.out:	test.S sys.i zasm zdump zpp 
	./zasm test.S -o z.out
dumpd.txt:	z.out zdump
	./zdump z.out > dumpd.txt
## }}}

## C-Tags
## {{{
tags: $(SOURCES) $(HEADERS)
	@echo "Generating tags"
	@ctags $(CFILES) $(HFILES) # $(SOURCES) $(HEADERS)
## }}}

## Dependency handling
## {{{
define	build-depends
	@echo "Building dependency file(s)"
	@$(CXX) -I $(OBJDIR)/ $(CCFLAGS) -MM $(CFILES) > xd.txt
	@$(CXX) -I $(OBJDIR)/ -I. $(CCFLAGS) -MM $(OBJDIR)/zasm.tab.c >> xd.txt
	@$(CXX) -I $(OBJDIR)/ -I. $(CCFLAGS) -MM $(OBJDIR)/zpp.cpp >> xd.txt
	@sed -e 's/^.*.o: /$(OBJDIR)\/&/' < xd.txt > $(OBJDIR)/depends.txt
	@rm xd.txt
endef

.PHONY: depends
depends: tags
	$(build-depends)

$(OBJDIR)/depends.txt: $(OBJDIR)/ $(SOURCES) $(HEADERS)
	$(build-depends)
## }}}

.PHONY: clean
## {{{
clean:
	rm -rf $(OBJDIR) $(PROGRAMS) z.out dumpd.txt
## }}}

-include $(OBJDIR)/depends.txt
